Hey Steve and Raam – when I copied / pasted Raam’s command from up above, I had to delete and retype just the “–” part before the word uninstall at the end of the command – for some reason firefox or osx copied that dash character wrong…
It was weird but once I retyped that part I didn’t get the “Must specify package name or nuke” message anymore. Just thought I’d throw my experience in if anyone else finds their way here.
Thanks for having this thread, the updater was driving my crazy, too. I don’t even use picasa, I was just trying it out and kept it to help guide some friends that wanted to use it. Ugh.